Just follow the instructions posted at one of the web sites below,
read each of the steps carefully so you understand what you will be doing a
step by step before you actually start the repair process.
Windows will keep your previous settings, including applications and
device drivers.
If your XP CD is a SP1 or SP2 version and you have installed SP3,
then consider creating a "Slipstreamed" version of your original CD
that incorporates SP3.
Word of warning: Always backup any important data files just incase
things don't go as expected. Read all three articles mention below
"carefully" and see if a Repair Install meets your needs
See:
http://www.michaelstevenstech.com/XPrepairinstall.htm
and: Windows XP Repair Install - How extreme can you go
http://www.pagestart.com/repairinstall.html
Note: IE7 and IE8 users read this before you start:
"How to perform a repair installation of Windows XP if a later version of
Internet Explorer is installed"
http://support.microsoft.com/kb/917964
If the PC boots and you are able to logon, then check 'Device Manager' and
look for any Yellow ?
You may need to re-install the device drivers or if you are moving to a new
computer then
have your drive disk ready as you will need to install the Chipset drivers,
LAN, Sound any possibly
others.
Finally go to Windows Update site and install all the updates as they will
need to be reinstalled.
Also read:
Non Destructive Repair of XP by Fred Langa:
http://www.informationweek.com/windows/showArticle.jhtml?articleID=189400897
How to perform an in-place upgrade (reinstallation) of Windows XP
http://support.microsoft.com/kb/315341
Fred Langa:
http://www.informationweek.com/news/windows/showArticle.jhtml?articleID=189400897